Dresden 2014 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 37: Poster Session 2
CPP 37.55: Poster
Mittwoch, 2. April 2014, 15:00–19:00, P3
Novel thermoresponsive block copolymers of various architectures - a fluorescence correlation spectroscopy investigation of the micelle formation — •Konstantinos Kyriakos1, Christina Psylla1, Sarah Ottinger1, Anna Miasnikova2, André Laschewsky2, Peter Müller-Buschbaum1, and Christine M. Papadakis1 — 1TU München, Physik-Department, Garching — 2Universität Potsdam, Institut für Chemie, Potsdam-Golm
Amphiphilic copolymers with a thermoresponsive block in aqueous solution self-assemble into micelles with a thermoresponsive shell. Poly(methoxy diethylene glycol acrylate) PMDEGA is a new thermoresponsive polymer, which exhibits a cloud point in the range 35-45 ∘C, i.e. within the most interesting physiological window [1,2]. However, the characteristics of the transition at the cloud point are very different from the ones of the often studied poly(N-isopropylacrylamide) (PNIPAM).
We report here on fluorescence correlation spectroscopy (FCS) experiments on very dilute solutions of various P(S-b-MDEGA) block copolymers differing in chain architecture: a diblock, a triblock and a three-arm star copolymer. It was found that, below the cloud point, all three polymers form micelles above the critical micelle concentration (CMC) and have similar hydrodynamic radii.
[1] Miasnikova, A., Laschewsky A. J. Polym. Sci. Part A: Polym. Chem. 50, 3313 (2012)
[2] Miasnikova, A. et al. Langmuir 28, 4479 (2012)